1967 Daimler 2.5 Litre Tires

The 1967 Daimler 2.5 Litre uses two primary tire sizes: 640-15 in bias-ply construction and 185R15 in radial construction. Both are 15-inch fitments, so the choice is centered on construction style as much as size format.

That means the first step is deciding whether the car will keep a traditional bias-ply look or use a radial setup. If the car has been restored, modified, or fitted with different wheels over the years, confirm the actual wheel width and current tire clearance before choosing between the two size paths.

The 1967 Daimler 2.5 Litre uses a 15-inch rim with both of its primary tire sizes. That applies whether the car is fitted with the 640-15 bias-ply size or the 185R15 radial size.

Rim diameter is only part of the fitment picture, though, because wheel width also matters when choosing between available tires. Some 640-15 and 185R15 products are intended for different rim-width ranges, so it is worth measuring the actual wheels on the car instead of assuming every 15-inch wheel suits every tire offered.

640-15 is a vintage numeric bias-ply size. The 6.40 refers to the tire's nominal section width in inches, while 15 refers to the wheel diameter in inches, making it a traditional sizing format commonly seen on mid-century vehicles.

On a 1967 Daimler 2.5 Litre, that size points toward a period-style bias-ply fitment rather than a modern metric radial. Owners looking at this size should compare sidewall style, intended appearance, and wheel width carefully, especially if the car may have changed wheels or suspension settings during restoration or long-term ownership.

640-15 is a bias-ply tire size for the 1967 Daimler 2.5 Litre. It uses the older numeric sizing convention and is offered in classic bias-ply series from brands such as BFGoodrich, Firestone, Avon, and Excelsior.

Choosing 640-15 usually means keeping a more traditional visual character and construction type on the car. That can matter for owners focused on period-style restoration, but wheel width and overall setup should still be checked carefully, especially if the car no longer wears its original wheels or has seen suspension changes over time.

Radial equivalents for 640-15 include 175R15 as an 80-series metric radial, P175/75R15 as a 75-series P-metric radial, and P185/70R15 as a 70-series P-metric radial. Those sizes are alternatives to the original bias-ply format, not additional primary fitments.

Each equivalent follows a different sizing convention, so the decision is more involved than simply matching the 15-inch rim diameter. A 5 to 6 inch recommended rim-width range is associated with these radial alternatives, and the car should be checked for wheel compatibility, overall tire dimensions, and clearance before any conversion is finalized.

Either can be appropriate, depending on how the 1967 Daimler 2.5 Litre is being used and presented. The car accepts a 640-15 bias-ply fitment for a more traditional look, while 185R15 provides a radial path in a period-sympathetic 15-inch size.

Bias-ply usually appeals to owners emphasizing vintage appearance, while radial choices often attract drivers focused on regular road use. The better choice depends on the car's wheels, the condition of its suspension and steering components, and whether maintaining a classic visual stance matters more than changing to a modern tire construction.

Start with the correct primary fitment path: 640-15 if the goal is a bias-ply setup, or 185R15 if the goal is a radial setup. From there, compare wheel-width suitability, sidewall style, construction type, and the tire series that best matches how the car is used and presented.

Appearance matters on a car like this, but so does compatibility with the actual wheels now on the vehicle. It helps to confirm whether the Daimler still wears stock-style rims, then compare the available blackwall, whitewall, or redline choices in the correct size before narrowing the selection to a particular brand or series.

Sidewall choices for the 1967 Daimler 2.5 Litre include blackwall, narrow whitewall, wide whitewall, and redline, depending on the size and tire series selected. The radial 185R15 offerings include blackwall, narrow whitewall, and redline, while 640-15 bias-ply choices include blackwall, narrow whitewall, and wide whitewall.

That makes sidewall style a meaningful part of the decision, especially on a sedan with strong visual character. A whitewall can push the car toward a more formal restoration-oriented look, while blackwall or redline choices create a different presentation, so the final choice should reflect both the car's finish and the owner's broader restoration goals.

Available brands for the 1967 Daimler 2.5 Litre include Coker Classic, Michelin, Avon, Universal Vintage Tire, BFGoodrich, Firestone, and Excelsior. Brand availability depends on the size and construction selected, with 185R15 focused on radial offerings and 640-15 centered on bias-ply options.

The practical comparison is not simply brand name, but how each product differs in sidewall style, tire series, and wheel-width compatibility. Once the correct size path is chosen, it becomes easier to compare whether a specific tire supports the appearance and road-use plan the car is being built or maintained around.

For a period-style 1967 Daimler 2.5 Litre, the 640-15 bias-ply fitment is the most traditional starting point. That size is available in classic bias-ply series with blackwall, narrow whitewall, and wide whitewall treatments that suit different restoration directions.

The right choice depends on how strictly the car is being presented and what visual effect is desired. Owners chasing exact historical accuracy should confirm brand and sidewall details through marque references or period documentation, while others may simply choose the 640-15 tire that best matches the car's restored stance and character.

Tire construction changes the visual impression of the car as much as the ride character. A 640-15 bias-ply setup gives the 1967 Daimler 2.5 Litre a more traditional mid-century presentation, while 185R15 radial choices introduce a more modern tire format even when offered in vintage-inspired styles.

That difference becomes especially noticeable when the car is viewed in profile, since sidewall shape and styling influence the whole stance. Owners planning a restoration should decide early whether the goal is a more authentic period look or a road-oriented radial presentation, then match the sidewall treatment to that decision.

Yes, modifications can affect tire fitment on a 1967 Daimler 2.5 Litre even when the tire size itself is correct. Changes to wheel width, wheel offset, ride height, suspension components, or body clearance can all alter how a 640-15 or 185R15 tire sits and moves on the car.

A Daimler that has aftermarket wheels or altered suspension should be measured rather than judged by catalog size alone. Check wheel dimensions, steering travel, and fender clearance before settling on a tire, especially when moving between bias-ply and radial construction or when replacing long-installed tires with a different series.

Before road use, inspect tire pressure, wheel condition, lug security, visible clearance around the fenders and suspension, and the general condition of steering and suspension components. On a collector car such as a 1967 Daimler 2.5 Litre, it also makes sense to look for fluid leaks or worn bushings that could affect how the car tracks.

A short, careful test drive is a smart follow-up after installation. Listen for rubbing, note any pull or vibration, and recheck inflation once the tires have settled in, since an older vehicle can reveal wheel or chassis issues that were less obvious before the change to fresh tires.

Collector-car tires should be checked regularly for pressure loss, sidewall cracking, cuts, bulges, tread wear, and signs of age-related deterioration. On a 1967 Daimler 2.5 Litre that may spend long periods parked, visual condition matters just as much as miles driven.

Storage conditions make a difference, so the car should be kept away from prolonged sunlight, excess heat, moisture, and ozone sources when possible. It also helps to inspect the tires before every meaningful drive, since a classic sedan can appear fine at rest while still carrying tires that have aged out or developed hidden issues.